
class Circles{
    private  double radius;
    public Circles(double radius)
    {this.radius=radius;}
    public void getradius(){
        System.out.println("radius:"+radius);}
    public void getarea(){
        System.out.println("area:"+Math.PI*Math.PI*radius);}
    public void zhouchang(){
        System.out.println("zhouchang:"+2*Math.PI*radius);}
};



public class Circle {
    public static void main(String[]args){
        Circles a=new Circles(3.2);
        a.getradius();
        a.getarea();
        a.zhouchang();
    }

}
